This is a killer deal. I have this model and love it. I have never powered my Traeger but I have powered a 32" TV and my notebook while I sat outside watching a game and smoking a cigar and it lasted the entire football game.
I always power my Traeger with a slightly bigger Jackery. I bought it for the overnight cooks, but I use it for all cooks so that I don't have to run an extension cord across the patio. It also powers the FireBoard when it is low on power. It also works in freezing weather.
My 240 was delivered today. It's a lot smaller than I thought it would be. Bought it mainly to power a TV while tailgating, but I'll give it a try with my Traeger next time I cook. I'll report back on how long it'll power it.